package util;

import java.io.BufferedInputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.text.DecimalFormat;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Date;

import java.util.List;


import org.apache.poi.hssf.usermodel.HSSFCell;

import org.apache.poi.hssf.usermodel.HSSFDateUtil;

import org.apache.poi.hssf.usermodel.HSSFRow;

import org.apache.poi.hssf.usermodel.HSSFSheet;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;

import org.apache.poi.poifs.filesystem.POIFSFileSystem;


public class ExcelTool {


    public static void main(String[] args) throws Exception {

        File file = new File("ip0408.xls");

        String[][] result = getData(file, 1);

        int rowLength = result.length;


        System.out.println("开始：");

        for (int i = 0; i < rowLength; i++) {

            System.out.print(result[i][1] + ";");//显示每行的第2列信息

        }
        System.out.println();

        System.out.println("结束");





        //输出全部数据

//        for (int i = 0; i < rowLength; i++) {
//
//            for (int j = 0; j < result[i].length; j++) {
//
//                System.out.print(result[i][j] + "\t\t");
//
//            }
//
//            System.out.println();
//
//        }




    }

    /**
     * 读取Excel的内容，第一维数组存储的是一行中格列的值，二维数组存储的是多少个行
     *
     * @param file       读取数据的源Excel
     * @param ignoreRows 读取数据忽略的行数，比喻行头不需要读入 忽略的行数为1
     * @return 读出的Excel中数据的内容
     * @throws FileNotFoundException
     * @throws IOException
     */

    public static String[][] getData(File file, int ignoreRows)

            throws FileNotFoundException, IOException {

        List<String[]> result = new ArrayList<String[]>();

        int rowSize = 0;

        BufferedInputStream in = new BufferedInputStream(new FileInputStream(

                file));

        // 打开HSSFWorkbook

        POIFSFileSystem fs = new POIFSFileSystem(in);

        HSSFWorkbook wb = new HSSFWorkbook(fs);

        HSSFCell cell = null;

        for (int sheetIndex = 0; sheetIndex < wb.getNumberOfSheets(); sheetIndex++) {

            HSSFSheet st = wb.getSheetAt(sheetIndex);

            // 第一行为标题，不取

            for (int rowIndex = ignoreRows; rowIndex <= st.getLastRowNum(); rowIndex++) {

                HSSFRow row = st.getRow(rowIndex);

                if (row == null) {

                    continue;

                }

                int tempRowSize = row.getLastCellNum() + 1;

                if (tempRowSize > rowSize) {

                    rowSize = tempRowSize;

                }

                String[] values = new String[rowSize];

                Arrays.fill(values, "");

                boolean hasValue = false;

                for (short columnIndex = 0; columnIndex <= row.getLastCellNum(); columnIndex++) {

                    String value = "";

                    cell = row.getCell(columnIndex);

                    if (cell != null) {

                        // 注意：一定要设成这个，否则可能会出现乱码

                        cell.setEncoding(HSSFCell.ENCODING_UTF_16);

                        switch (cell.getCellType()) {

                            case HSSFCell.CELL_TYPE_STRING:

                                value = cell.getStringCellValue();

                                break;

                            case HSSFCell.CELL_TYPE_NUMERIC:

                                if (HSSFDateUtil.isCellDateFormatted(cell)) {

                                    Date date = cell.getDateCellValue();

                                    if (date != null) {

                                        value = new SimpleDateFormat("yyyy-MM-dd")

                                                .format(date);

                                    } else {

                                        value = "";

                                    }

                                } else {

                                    value = new DecimalFormat("0").format(cell

                                            .getNumericCellValue());

                                }

                                break;

                            case HSSFCell.CELL_TYPE_FORMULA:

                                // 导入时如果为公式生成的数据则无值

                                if (!cell.getStringCellValue().equals("")) {

                                    value = cell.getStringCellValue();

                                } else {

                                    value = cell.getNumericCellValue() + "";

                                }

                                break;

                            case HSSFCell.CELL_TYPE_BLANK:

                                break;

                            case HSSFCell.CELL_TYPE_ERROR:

                                value = "";

                                break;

                            case HSSFCell.CELL_TYPE_BOOLEAN:

                                value = (cell.getBooleanCellValue() == true ? "Y"

                                        : "N");

                                break;

                            default:

                                value = "";

                        }

                    }

                    if (columnIndex == 0 && value.trim().equals("")) {

                        break;

                    }

                    values[columnIndex] = rightTrim(value);

                    hasValue = true;

                }


                if (hasValue) {

                    result.add(values);

                }

            }

        }

        in.close();

        String[][] returnArray = new String[result.size()][rowSize];

        for (int i = 0; i < returnArray.length; i++) {

            returnArray[i] = (String[]) result.get(i);

        }

        return returnArray;

    }


    /**
     * 去掉字符串右边的空格
     *
     * @param str 要处理的字符串
     * @return 处理后的字符串
     */

    public static String rightTrim(String str) {

        if (str == null) {

            return "";

        }

        int length = str.length();

        for (int i = length - 1; i >= 0; i--) {

            if (str.charAt(i) != 0x20) {

                break;

            }

            length--;

        }

        return str.substring(0, length);

    }

}
